AB1341 COVID-19 IN PATIENTS WITH RHEUMATIC IMMUNE-MEDIATED INFLAMMATORY DISEASES IN AMERICA: DIFFERENCES AND SIMILARITIES BETWEEN MEXICO AND ARGENTINA
Authors: C. A. Isnardi, D. Alpizar-Rodriguez, M. U. Martínez-Martínez, R. Quintana, I. E. Petkovic, S. Ornella, V. V. Castro Coello, E. Velozo, D. Zelaya, M. Severina, A. K. Cogo, R. Nieto, D. A. Pereira, I. J. Colunga-Pedraza, F. Irazoque-Palazuelos, G. C. Reyes Cordero, T. S. Rodriguez-Reyne, J. A. Veloz Aranda, C. M. Skinner Taylor, I. M. Juarez Mora, B. E. Zazueta Montiel, A. Martínez, C. F. Pacheco Tena, G. Pons-Estel
Journal: Annals of the Rheumatic Diseases (2023)

<h3>Background</h3> Patients with immune-mediated rheumatic diseases (IRD) have poorer outcomes of SARS-CoV-2 infection compared to the general population. <h3>Objectives</h3> To assess and compare clinical course, severity and complications of SARS-CoV-2 infection in patients with rheumatic immune-mediated inflammatory diseases (IMIDs) from Mexico and Argentina. <h3>Methods</h3> Data from both national registries, CMR-COVID (Mexico) and SAR-COVID (Argentina), were combined. Briefly, adult IRD patients with SARS-CoV-2 infection were recruited between 08.2020 and 09.2022 in SAR-COVID and between 04.2020 and 06.2022 in CMR-COVID. Sociodemographic data, comorbidities, and DMARDs were recorded, as well as clinical characteristics, complications, and treatment for SARS-CoV-2 infection. Descriptive analysis. Chi square, Fisher, Student T, Mann Whitney U tests and multiple logistic regression analyses were performed. <h3>Results</h3> A total of 3709 patients were included, 1167 (31.5%) from the CMR-COVID registry and 2542 (68.5%) from the SAR-COVID registry. The majority (82.3%) were women, with a mean age of 50.4 years (SD 14.4). The most frequent IRD were rheumatoid arthritis (47.5%) and systemic lupus erythematosus (18.9%). Mexican patients were significantly older, had a higher female predominance and had higher prevalence of rheumatoid arthritis, antiphospholipid syndrome, and axial spondyloarthritis, while the Argentine patients had more frequently psoriatic arthritis and ANCA-associated vasculitis. In both cohorts, approximately 80% were in remission or low disease activity at the time of infection. Mexicans took glucocorticoids (43% vs 37%, p&lt;0.001) and rituximab (6% vs 3%, p&lt;0.001) more frequently. They also reported more comorbidities (48% vs 43%, p=0.012). More than 90% of patients presented symptoms related to SARS-CoV-2 infection. The frequency of hospitalization was comparable between the groups (23.4%), however, the Mexicans had more severe disease (Figure 1) and a higher mortality rate (9.4% vs 4.0%, p&lt;0.0001). After adjusting for risk factors, Mexicans were more likely to die due to COVID-19 (OR 2.2, 95%CI 1.5-3.1). <h3>Conclusion</h3> In this cohort of patients with IRD from Mexico and Argentina with SARS-CoV-2 infection, the majority presented symptoms, a quarter were hospitalized and 6% died due to COVID-19. Mexicans presented more severe disease, and after considering risk factors they were two times more likely to die. <h3>REFERENCES:</h3> NIL. <h3>Acknowledgements:</h3> NIL. <h3>Disclosure of Interests</h3> Carolina Ayelen Isnardi Grant/research support from: SAR-COVID is a multi- sponsor registry, where Pfizer, Abbvie, and Elea Phoenix provided unrestricted grants. None of them participated or infuenced the development of the project, data collection, analysis, interpretation, or writing the report. They do not have access to the information collected in the database, Deshire Alpizar-Rodriguez: None declared, Marco Ulises Martínez-Martínez: None declared, Rosana Quintana: None declared, Ingrid Eleonora Petkovic: None declared, Sofia Ornella: None declared, Vanessa Viviana Castro Coello: None declared, Edson Velozo: None declared, David Zelaya: None declared, María Severina: None declared, Adriana Karina Cogo: None declared, Romina Nieto: None declared, Dora Aida Pereira: None declared, Iris Jazmin Colunga-Pedraza: None declared, Fedra Irazoque-Palazuelos: None declared, GRETA CRISTINA REYES CORDERO: None declared, Tatiana Sofía Rodriguez-Reyne: None declared, JOSE ANTONIO VELOZ ARANDA: None declared, Cassandra Michele Skinner Taylor: None declared, INGRID MARIBEL JUAREZ MORA: None declared, Beatriz Elena Zazueta Montiel: None declared, Atzintli Martínez: None declared, Cesar Francisco Pacheco Tena: None declared, Guillermo Pons-Estel: None declared.